Die and press-stamping tool.



No. 735,097. PATBIrBD AUG. 4, 190s.

G. HIGGINSON. DIE AND PRESS STAMPING T001..

APPLICATION FILED JAN. 21, 1903.

N0 MODEL. 3 EBT V l.

No. 735,097. PATBNTED AUG. 4, 1903. G. FIC HNSON.

DIE AND PRESS STAMPING TOOL.

APPLIOATION FILED JAN. 21, 1903. No MODEL. 3 SHBBTS-SHBBT 2.

PATENTED AUG. 4, 1903.. G. HIGGINSON.

DIE AND R ss STAMPING TOOL.

APPLIO N FILED JAN. 21, 1903.

3 SHEETS-SHEET 3.

N0 MODEL.

/Nyf/VTOR.-

UNITED STATES Patented August 4, 1903.

PATENT OFFICE;

GEORGE HIGGINSON, OFLONDON, ENGLAND, ASSIGNOR TO JAMES NOBLE GRAHAM, OF GLASGOW, SCOTLAND, AND EMMA CROFT, OF DODDING- TON, KENT, ENGLAND.

DIE AND PRESS-STAMPING TOOL.

SPECIFICATION forming part of Letters Patent No. '7 35,097, dated August 4, 1903.

Application led January 21, 1903. Serial No. 139,951. (No model.)

To all whom, it may concern:

Be it known that I, GEORGE HIGGINsoN, mechanical engineer, of 3l Buckingham Gate, London, England, have invented certain new 5 and useful Improvements in Dies and Press- Stamping Tools, of which the following is a specification.

This invention relates to dies and pressstamping tools, and has for its object to proro vide a machine which will stamp and draw two or more blanks of the same or different section at one blow, perforate one or both, if desired, and deliver two or more press-pieces attached to one another and disposed cen- [5 trally or otherwise with one another.

A stamping-press tool made in accordance with my invention comprises an upper tool and a lower tool, one or both of said tools being provided with a spring-pressed pressure zo ring or block having a cutting edge disposed centrally or otherwise adapted to coact with a cutting edge on or in the tool, in which the pressure-ring having the cutting edge is disposed, and in some cases the said tools are combined with jaws or indenting and folding devices located in the tools and serving to indent or indent and perforate or fold the blanks or portions thereof in such manner that they are firmly secured together. One 3o such stamping-tool made in accordance with my invention for stamping and drawing two pieces of metal plate at one operation comprises an upper tool, a spring-pressed pressure ring, block, or plate, carrying or not carrying a center pin or punch, said pressurering being disposed in the upper tool, a bottom block, a cutting edge disposed in the bottom block, a second spring-pressed pressure ring, block, or plate also disposed in the 4o bottom block and provided with a cuttingrim and guide, a bottom center-forming block adapted to coact with the cutting-rim of the second pressure-ring and with the upper die, and spring-,pressed side jaws adapted to be moved and operated by inclined planes or projections on the second pressure-ring, a space between the upper tool and the second pressure-ring for passing in a strip of metal plate to be stamped, and a space through the second pressure-ring and under the cutting by the screw 8.

edge thereof for passing in a second strip of metal plate to be stamped and passing out the clippings or waste metal.

Referring now to the drawings, Figure lis a sectional front elevation of one form of stamping-tool made in accordance with my invention. Fig. 2 is a sectional side elevation, and Fig. 3 is a sectional plan ou line A B.

ct is a top tool having a cutting edge b and formed with a cylindrical recess c and smaller 6o recesses d, disposed therein. In the recess c is a spring-pressed pressure-ring c.

f f are spiral springs disposed in the recesses d between the ring e and the bottom of the recess d.

g is a hardened-steel center punch or pin carried by the spring-pressed pressure-ring c and disposed on a cross-bar h of the said pressure-ring. lo, the middle portion of the upper tool, is provided with aslot j, in which 7o the cross-bar h may ride, and a hole l is provided, in which the center-pin g may travel.'V

o is a shoulder adapted to coact with a corresponding shoulder m on the upper pressurering e ,and forms a stop to the said ring.

The part 7c is made separately for ease of construction and is screwed to the upper tool a at p. The top of the recess c is adapted to form a stop to the upper surface r of the pressure-ring e.

s is a bottom block having a cutting edge tand a cylindrical recess 'u and smaller recesses w x, disposed therein. In the recess 'u is a spring-pressed pressure-ring y, provided with a slot 1, having a cutting edge 2. Guides 3 are provided on the under side of the pressure-ring y and are adapted to ride in the recesses y 4L 4 are spiral springs disposed in the recesses 1u between the shoulders 5 of the re- 9o cess w and the second pressure-ring y. These springs are disposed around the guides 3. The pressure-ring y is made sufficiently deep below its cutting edge'to form a support and guide to itself in use.

6 6 represent an annular-shoulder in the block s, adapted to form a stop to the pressure-ring'y. E, l

7 is a forming-block secured to the block s This block has a cuttingroo rim 9 and is provided with vertical grooves 10, adapted to receive the side jaws 11. A slot is formed in the bottom-former 7, adapted to receive a rubber plug 13, which when in place bears against the side jaws 11 and forces them apart. Grooves 14 are formed j inthe second pressurering y and so dis- 14, above referred to.

posed as to come opposite the grooves 10 in the former 7. Said grooves are adapted to receive the side jaws 11.

15 represents inclined planes in the grooves of the second pressure-ring y, adapted to coact with the corner 16 of the side jaws and to cause them to close toward one another. The side jaws 11 are disposed in recesses 17 in the block 7 and between the grooves 10 and These jaws are each formed with a projection 18.

19 is a gap or space between the upper and bottom tools, and 2O is a slot formed in the part s opposite the slot 1 in the second pressure-ring yfor passing a strip of metal therethrough and through which the clippings from the said strip` of metal will pass.

In operation, assuming the tool to be in the position shown in Fig. 1, a strip of metal is placed in the. gap 19 and another strip of metal is passed through the aperture 20 in the block s and through the slot 1, so as to lie between the former 7 and the cutting edge 2. Pressure is then brought to bear on the upper tool a, causing it to descend. The center-pin g strikes the upper piece of metal'and makes a burred hole therein. The pressure being continued, the tool farther descends until the upper metal plate is gripped between the ring c and the ring y. On continuing the descent the ring e is `caused to recede against the springf, carrying with it the center-punch g until it no longer projects below the face of the upper center-punch k. On the farther descent of the upper tool the upper plate is carried down between the rings e and ly and is sheared between the cutting edges b and t. The second pressure-ring now engages the lower metal strip and shears it between the cutting edges 2 and 9. The spiral springs f are preferably of less strength than the springs 4. The top and bottom tools are now drawn close together, and just as the two sheets of metal get their inal squeeze the inclined plates 15 on the second pressurering 'y engage the nose 16 of the rocking jaws 1l, causing them to indent the two plates laterally and to clench them together. The bur on the under side of the upper plate made by the pin g causes a cup-shaped projection or recess to be formed in the lower plate. The upper die a, the second pressurering y, and the bottom tool or former 7 are made to the shape or contour to which it is desired to stamp and draw the metal. On lifting the upper tool a the springs 4 lift the pressure-ring y, so that the inclined planes 1 5 leave the nose 16 ofthe jaws 11. The jaws then fly open under the resilient action of the rubber block or plug 13 and leave the part which has been formed from the under plate securely attached to the part which has been formed out of the upper plate. The finished article is now lifted between the pressure-rings y and e. When the die has been sunciently raised, the parts of the tool assume their normal position, as shown in Fig. 1. The press is preferably mounted on an incline to allow the blanks and clippings to fall freely from the machine as soon as they are released from between the rings y and e.

In some cases I may provide guides on the French system and a screw attachment which could be used as a micrometer-gage to govern and regulate to a fine degree of accuracy the length of stroke and tightness by which the two pieces are attached.

In some cases I may introduce a piece of linen or other fabric or material between or adapted to be gripped between the said plates.

What I claim, and desire to secure by Letters Patent, is-

1. A stamping-press tool with a cutting edge and a spring-pressed pressure-ring disposed in the tool and having a cutting edge adapted to coact with the cutting edge of the tool, substantially as described.

2. In a stamping-press tool the combination of a tool, a second tool, a spring-pressed pressure-ring disposed on one of the tools, a cutting edge on the pressure-ring, a cutting edge on the tool in which the pressure-ring is disposed and adapted to engage with the cutting edge on the pressure-ring, a spring disposed between the pressure-ring and the tool on which it is located and adapted to keep the cutting edge of the ring normally apart from the corresponding cutting edge in the tool, means for bringing the two tools together and the cutting edge in the pressure-ring into action with the corresponding edge in the tool, substantially as described.

3. In a stamping-press tool the combination of an upper tool, a lower tool, a spring-pressed pressure-ring disposed on one of the tools, a cutting edge on the pressure-ring, a cutting edge on the tool in which the pressure-ring is disposed, and adapted to coact with the cutting edge on the pressure-ring, a spring disposed between the pressure-ring and the tool in which it is located and adapted to keep the cutting edge of the ring normally apart from the corresponding edge in the tool, jaws located in one of the tools and held normally open by a resilient plug, means for bringing the upper and lower tools together and the cutting edge in the pressure-ring into action with the corresponding edge in the tool and for contracting the jaws, substantially as described.

4. In a stamping-press tool the combination of a tool, a spring-pressed pressure-ring in said tool, a punch disposed in said pressurering, a second tool, a spring-pressed pressurering disposed in said second tool, a cutting edge on the pressure-ring, a cutting edge on the second tool adapted to engage with the cutting edge of the pressure-ring a spring dis- IOO IIO

posed between the pressurering and the tool In witness whereof I have hereunto signed in which it is located and adapted to keep the my name in the presence of two subscribing ro' cutting edge of the ring normally apart from witnesses.

the corresponding cutting edge in the tool,

means for bringing the two tools together and I GEGRGE HIGGJNSON' the cutting edge in the pressure-ring into ac- Witnesses:

tion with the corresponding edge in the tool, CHARLES J. JONES,

substantially as described. HENRY A. PRYOR. 

